Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dc1ff43dff4ad4e…

MALICIOUS

PDF

52.2 KB Created: 2020-10-15 18:23:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0e230c83502889aa319a9ab3a0e007c1 SHA-1: 6a2c54f33e522b010b382054449ce11aefd956dc SHA-256: 1dc1ff43dff4ad4e4dac452d9880e1f2d251b1aefcb6d001393f3d4ac1a0b793
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically 'ttraff.me'. The document body, though heavily obfuscated, contains text related to image to PDF conversion and the malicious URL, suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links to external PDFs, many hosted on 'strikinglycdn.com' and 'mozfiles.com', indicates a link farm designed to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/pify?keyword=convert+images+to+pdf+linux+command+line In PDF document text
    • https://site-1039390.mozfiles.com/files/1039390/2782653298.pdfIn PDF document text
    • https://site-1040771.mozfiles.com/files/1040771/dagajapupuxixedorez.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/sovoriletaje.pdfIn PDF document text
    • https://site-1043295.mozfiles.com/files/1043295/36307268515.pdfIn PDF document text
    • https://site-1043175.mozfiles.com/files/1043175/netoluxevotow.pdfIn PDF document text
    • https://site-1038437.mozfiles.com/files/1038437/butulurabedaxeko.pdfIn PDF document text
    • https://site-1043207.mozfiles.com/files/1043207/nimunoromedajigirexifoge.pdfIn PDF document text
    • https://site-1039290.mozfiles.com/files/1039290/dulikukanapogijafamad.pdfIn PDF document text
    • https://site-1037897.mozfiles.com/files/1037897/77830995719.pdfIn PDF document text
    • https://site-1042264.mozfiles.com/files/1042264/zozirusapinikurinazesiril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e936b3d2-3e87-47bb-ba84-f77720d4ae45/vepepejifofigexiji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01de9459-abe4-4afe-8763-94829cc371ba/71511714229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f7451f-93b1-4793-b247-b04152f76152/77275482537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e85fd77-4af8-449d-8945-5d3dd758d5a1/98764100324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1620/2651/files/69361776960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7452/5594/files/94512966938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/modenojaralodudar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/4424/7973/files/89661160530.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6976/7321/files/terrarium_apk_no_ads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/24598356334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/band_of_beauty_promo_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/castle_crashers_pets_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/the_real_l_word_imdb_parents_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/proving_triangles_similar_worksheet_with_answer_key.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A8 5508 bytes
SHA-256: 7ea3b23a140f89b619a0398de48bccdd60e345756002c43fc35d7d4b834f23f0
font_01_sfnt_off00009657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9657 13972 bytes
SHA-256: af9b21c5dab1a796bcf0c8f0e676cb73a25245449d1d50082ad1493f53320c44